Improvement in molders  flasks



J. VA. BLAKE.

Moldevrs Flask. i

No` 125,012l Patented Apri|23,87`2.

Uivrrnn S'rn'rns JOSIAH ALLEN BLAKE, OF PROVIDENCE, RHODE ISLAND.

IMPROVEMENT IN MOLDERS FLASKS.

Specification forming part of Letters Patent No. 126,012, dated April23, 1872.

To all whom 'it may concern: y

Be it known that I, J osrnn ALLEN BLAKE, of the city and county ofProvidence, in the State of Rhode Island, have invented a cer tain newand useful Improvement in Molders Flasks.

In the process of molding it is well known that when the patterns areremoved from the sand there is a tendency for the impressions to becomebroken, resulting in an imperfect casting. This is particularly the casein that class of castin gs which, from their peculiar character, requirethe patterns to be mounted in halves on opposite sides of a match-plate,which is inserted between the two tlask-frames. To facilitate thewithdrawal from the sand of such patterns as are mounted on amatch-plate is the object of my invention; and it consists in a novelarrangement of vertically-operating lifters combined with a system ofcompound levers connected to the ask and arranged with relation to itand to the matchplate, in such a manner that by the operation of thelevers the litters are caused to elevate evenly and regularly thematch-plate and its patterns free from the sand; and I do hereby declarethat the following specilication, taken in connection with the drawingfurnished and forining part of the same, is a full, clear, and exactdescription of a flask constructed in accordance with my invention.

In the drawing, Figure 1 represents a view in perspective of one of myimproved flasks, with the several parts in position. Fig. 2represents anend view partly in section, showing more clearly the arrangement of thelevers and lifters for elevating the match-plate. Fig. 3 is a detachedview of the operating mechanism.

A and A denote the two sections ot' the lask.- B denotes the match-plateplaced between the sections A A. The patterns are secured to the sidesof the plate in the usual manner. Guide-pins or dowels a, attached tothe section A, pass through openings in the ends of the match-plate andenter corresponding recesses in the section A', and serve to hold theparts in their proper positions when brought together. C denotes ametallic casing, within which the operating mechanism is placed. One ofthese casings is attached to each end of each of the sections A A. D andD denote one pair or set of the lifters for elevating the match-plate B.Within each casing C two of these lifters are arranged, one at each end,as shown in Fig. 2. E andE denote the levers for actuating the lifters DD', they are supported within the casing C upon pivots I). The inner endc'of lever E, in this instance, is made of a rounded form, which entersa corresponding socket, d, in the inner end of the lever E. The outerend of the lever E is similar in form to the inner end of the lever E,and is arranged to connect with a recess, e, formed in the side of thelifter D. The outerend of the lever E is provided with an extension, F,and a projection, f, the latter entering a recess, g, in the lifter D.The arrangement of mechanism as above described is the same in theseveral casings G. Gr in each case denotes an operating lever. One isprovided for each section of the ask. It consists, in this instance, ofa rod, l1., supported in a groove in the side of the ask. The ends iofthe rod are curved, and enter the casings C at a point adjacent to theextensions F of the levers E, with which Vthey come in contact. Ahandle, H, is attached to the rod h,

by which it is semi-rotated in its bearings.

In the process of molding, the parts being in proper position, as shownin Fig. 1, the sand is packed within the section A or A upon the patternmatch-plate B. The position of the tiask is then reversed and the handleH of the lever Gr depressed. This operation causes the .rod h to turnand with it its curved ends 11,' the latter, acting upon the extensionsF of the levers E, raise the outer ends ofthe said levers, which causesa depression of their inner ends, and also a corresponding simultaneousdepression of the inner, and a raising of the outer ends of the leversE. The litters D D', being connected with the outer ends of the levers EE', are elevated with them, and by coming in contact with the plate Bthe patterns are raised in a truly vertical line from the sand. Theoperation as above described is then repeated upon the other section,and the impressions having been formed in both sections of the flask,they are placed together ready for the molten metal.

I am aware that previous to my invention various means have beenemployed in connec- Pn'rnn'r Grrron.

tion with molders flasks for removing the match-plate patterns from thesand; that movable legs or lifters, in connection with levers, have beenemployed, but in such cases the levers Were either operated by a screwor by a gear-Wheel connecting with segment vgears on the ends of thelevers. Unless closely protected, the screws or gearing Were liable tobecome clogged with dirt and thereby to render the operation of thelevers ineectnal. By the simple, peculiar, but effective arrange# mentof the mechanism for operating the lifters, as herein described, theremoval of the 'patterns from the sand is greatly facilitated

